/* Load an OGG stream from an SDL_RWops object */
OGG_music *OGG_new_RW(SDL_RWops *rw)
{
OGG_music *music;
ov_callbacks callbacks;
callbacks.read_func = sdl_read_func;
callbacks.seek_func = sdl_seek_func;
callbacks.close_func = sdl_close_func;
callbacks.tell_func = sdl_tell_func;
music = (OGG_music *)malloc(sizeof *music);
if ( music ) {
/* Initialize the music structure */
memset(music, 0, (sizeof *music));
OGG_stop(music);
OGG_setvolume(music, MIX_MAX_VOLUME);
music->section = -1;
if ( Mix_InitOgg() < 0 ) {
return(NULL);
}
if ( vorbis.ov_open_callbacks(rw, &music->vf, NULL, 0, callbacks) < 0 ) {
free(music);
SDL_RWclose(rw);
Mix_QuitOgg();
SDL_SetError("Not an Ogg Vorbis audio stream");
return(NULL);
}
} else {
SDL_OutOfMemory();
}
return(music);
}
int Mix_Init(int flags)
{
int result = 0;
if (flags & MIX_INIT_FLUIDSYNTH) {
#ifdef USE_FLUIDSYNTH_MIDI
if ((initialized & MIX_INIT_FLUIDSYNTH) || Mix_InitFluidSynth() == 0) {
result |= MIX_INIT_FLUIDSYNTH;
}
#else
Mix_SetError("Mixer not built with FluidSynth support");
#endif
}
if (flags & MIX_INIT_FLAC) {
#ifdef FLAC_MUSIC
if ((initialized & MIX_INIT_FLAC) || Mix_InitFLAC() == 0) {
result |= MIX_INIT_FLAC;
}
#else
Mix_SetError("Mixer not built with FLAC support");
#endif
}
if (flags & MIX_INIT_MOD) {
#ifdef MOD_MUSIC
if ((initialized & MIX_INIT_MOD) || Mix_InitMOD() == 0) {
result |= MIX_INIT_MOD;
}
#else
Mix_SetError("Mixer not built with MOD support");
#endif
}
if (flags & MIX_INIT_MP3) {
#ifdef MP3_MUSIC
if ((initialized & MIX_INIT_MP3) || Mix_InitMP3() == 0) {
result |= MIX_INIT_MP3;
}
#else
Mix_SetError("Mixer not built with MP3 support");
#endif
}
if (flags & MIX_INIT_OGG) {
#ifdef OGG_MUSIC
if ((initialized & MIX_INIT_OGG) || Mix_InitOgg() == 0) {
result |= MIX_INIT_OGG;
}
#else
Mix_SetError("Mixer not built with Ogg Vorbis support");
#endif
}
initialized |= result;
return (result);
}
int Mix_Init(int flags)
{
int result = 0;
if (flags & MIX_INIT_OGG) {
#ifdef OGG_MUSIC
if ((initialized & MIX_INIT_OGG) || Mix_InitOgg() == 0) {
result |= MIX_INIT_OGG;
}
#else
Mix_SetError("Mixer not built with Ogg Vorbis support");
#endif
}
initialized |= result;
return (result);
}
/* don't call this directly; use Mix_LoadWAV_RW() for now. */
SDL_AudioSpec *Mix_LoadOGG_RW (SDL_RWops *src, int freesrc,
SDL_AudioSpec *spec, Uint8 **audio_buf, Uint32 *audio_len)
{
OggVorbis_File vf;
ov_callbacks callbacks;
vorbis_info *info;
Uint8 *buf;
int bitstream = -1;
long samplesize;
long samples;
int read, to_read;
int must_close = 1;
int was_error = 1;
if ( (!src) || (!audio_buf) || (!audio_len) ) /* sanity checks. */
goto done;
if ( Mix_InitOgg() < 0 )
goto done;
callbacks.read_func = sdl_read_func;
callbacks.seek_func = sdl_seek_func;
callbacks.tell_func = sdl_tell_func;
callbacks.close_func = freesrc ?
sdl_close_func_freesrc : sdl_close_func_nofreesrc;
if (vorbis.ov_open_callbacks(src, &vf, NULL, 0, callbacks) != 0)
{
SDL_SetError("OGG bitstream is not valid Vorbis stream!");
goto done;
}
must_close = 0;
info = vorbis.ov_info(&vf, -1);
*audio_buf = NULL;
*audio_len = 0;
memset(spec, '\0', sizeof (SDL_AudioSpec));
spec->format = AUDIO_S16;
spec->channels = info->channels;
spec->freq = info->rate;
spec->samples = 4096; /* buffer size */
samples = (long)vorbis.ov_pcm_total(&vf, -1);
*audio_len = spec->size = samples * spec->channels * 2;
*audio_buf = malloc(*audio_len);
if (*audio_buf == NULL)
goto done;
buf = *audio_buf;
to_read = *audio_len;
#ifdef OGG_USE_TREMOR
for (read = vorbis.ov_read(&vf, (char *)buf, to_read, &bitstream);
read > 0;
read = vorbis.ov_read(&vf, (char *)buf, to_read, &bitstream))
#else
for (read = vorbis.ov_read(&vf, (char *)buf, to_read, 1/*LE*/, 2/*16bit*/, 1/*signed*/, &bitstream);
read > 0;
read = vorbis.ov_read(&vf, (char *)buf, to_read, 1, 2, 1, &bitstream))
#endif
{
if (read == OV_HOLE || read == OV_EBADLINK)
break; /* error */
to_read -= read;
buf += read;
}
vorbis.ov_clear(&vf);
was_error = 0;
/* Don't return a buffer that isn't a multiple of samplesize */
samplesize = ((spec->format & 0xFF)/8)*spec->channels;
*audio_len &= ~(samplesize-1);
done:
if (src && must_close)
{
if (freesrc)
SDL_RWclose(src);
else
SDL_RWseek(src, 0, SEEK_SET);
}
if ( was_error )
spec = NULL;
Mix_QuitOgg();
return(spec);
} /* Mix_LoadOGG_RW */
